.a {
    margin: 20px;
    width:20%;
    border-width: 2px;
    border-color: '#ff00ff';
    background: #fac002;
}
.b {
    margin: 20px;
    border-width: 2px;
    border-color: '#ff00ff';
    background: #9eafaf;
    opacity: 0.3;
}
.page {
    margin: 0 auto;
    text-align: center;
}
.tags {
    margin: 20px;
    widows: 50px;
    height: 25px;
}.aa {
    border-bottom: 1px solid rgba(0, 0, 0, 0.2);
}